Reenforced primary for starting or ignition systems



C. P. BR'OCKWAY.

REENFORCED PRIMARY FOR STARTING 0R IGNITION SYSTEMS. APPLICATION FILED DEC. 6. 1920. T

1,434,588. Patented Nov. 7*, 1922,.

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J'arl/Pflroclrrra W ATTORNEY Patented Nov. 7, 1922.

UNITED STATES PATENT OFFICE. I

CARL I. BROCKWAY, OF TOLEDO, OHIO, ASSIGNOR TO INDUSTRIAL RESEARCH CORPORATION, OF TOLEDO, OHIO, A CORPORATION OF DELAWARE.

REENFORCED PRIMARY FOR STARTING OR IGNITION SYSTEMS.

Application filed December 6, 1920. Serial No. 428,446.

T 0 all whom it may can (can Be it known that I. CARL P. BROCKWAY, a citizen of the United States, residing at Toledo. in the county of Lucas and State of Ohio. have invented certain new and useful Improvements in Reenforced Primaries for Starting or Ignition Systems, of which I declare the following to be a full, clear, and exact description.

This invention relates to an ignition system in which means are provided for reinforcing the primary current ofan induction coil during the time that the voltage of tho battery supplying the coil is reduced by current drawn by the starting motor for the engine.

In ordinary ignition circuits the voltage of the battery exciting the circuit is appreciably decreased when the battery is heavily loaded as during the period when the motor I is being accelerated as at starting. The decrease in battery voltage results in a weak ignition current and consequently an undesirable condition for starting the engine.

One object of this invention is to supplement the weak current drawn by theignition circuit under the above conditions with a second compensating current the effect of which is to restore the ignition current to approximately 'normal strength.

Another object is to provide means for simultaneously energizing the starting motor and the auxiliary ignition circuit.

A further object is the provision of means for increasing the ignition transformer flux without increasing the voltage of the current source.

Other objects and advantages relating to details of construction and economies of manufacture will appear as I proceed with the description of that embodiment of the invention which for the purpose of the present application I have illustrated in the accompanying drawing.

The figure represents a schematic diagram of a. preferred embodiment of my invention. The source of current l'is con nected through the usual form of interrupter 2 to the primary coil 3 of the induction coil or transformer 4, having the secondary coil 5 supplying the high potential sparking current through the distributor 6, and the spark plugs 7.

Across the source 1, is connected the starting motor 8, forming a second circuit in series with the source 1 and having in series therewith the witch 9, and the impedance 10, which may be an'inductance, or a noninductive resistance. The motor circuit when closed shunts the coil 3. A second primary coil 11 is provided for aiding the flux of the first primary coil 3. and it derives its current from the source 1, through the motor 8, in virtue of the potential developed across the impedance 10.

The ope-ration is as follows: On closing the switch 9 to operate the starting motor 8, a large current flows through impedance 10, causing an appreciable difference of potential between its terminals, this potential being directly applied to the second primary coil 11 in shunt of the impedance. The large current drawn by the motor decreases the terminal potential of the source 1, and consequently decreases the current through the mai primary coil 3. The magnetic flux produced by the primary coil 3 is less than normal under these conditions, but when supplemented by the flux from the second primary coil 11, the total flux is equal to the normal flux necessary to provide suitable sparking current in the secondary coil 5.

It will be seen that the ignition current is reenforced as described above whenever the switch 9 is closed to complete the circuit of the starting motor 8 and that the circuit is immediately restored to normal upon release of the switch 9 to break the circuit through the motor 8, thereby providing a very simple and effective means for insuring positive ignition under the various conditions met with in practice.

I am aware that the particular embodiment of my invention above described, and illustrated in the accompanying drawing is susceptible of considerable variation without departing from the spirit thereof, and therefore I desire to claim my invention both broadly and specifically as indicated by the appended claims.

I claim as my invention:

1. In an ignition system,-a source of current, an ignition circuit containing a transformer having a primary coil in series with said source; a second circuit containing a starting motor and an impedance in series therewith, said second circuit being shunted across said primary coil and decreasing the primary current in said primary circuit, a

second primary coil shunted across said im rent, an ignition circuit containing a transformer having a primary coil in series with said source; a second circuit containing a starting motor and a resistance in series therewith, said second circuit being shunted across said primary coil and decreasing the primary current in said primary circuit, a second primary coil shunted across said resist-ance. and aiding said first mentioned primary coil for reinforcing the effect of said primary current while said motor shunts said primary coil.

3. In an ignition system the combination of a battery; a circuit including a primary ignition coil in series with the battery; a circuit breaker in said circuit; a circuit including a starting motor; an impedance in series with the motor; a second primary circuit shunted around said impedance; a secondary ignition circuit in juxtaposition with said primary circuits; and switching.

means in the motor and secondary primary circuits operative to simultaneously open and close said circuits; 1

4. In an ignition system, the combination of a current source; a circuit including a transformer primary and current interrupter; a second circuit including a motor and impedance in parallel with the transformer primary; circuit interrupting means in said primary circuit; and [a third circuit including an auxiliary primary circuit, said third circuit being in parallel with the impedance and in series with the circuit interrupting means.

5. In an ignition system, the combination of a current source; a circuit lncludlng a motor and resistance, in series with the current source; a switch in the motor circuit between the motor and resistance; a circu1t..1nclud1ng a transformer prlmary and motor and in current interrupting device in parallel with the motor and resistance and a third circuit including an auxiliary transformer pri mary connected in parallel to said resistance, said third circuit being connected to one side of the resistance, through the current interrupting device and to the other side of the resistance through the motor circuit switch.

6. In an ignition system the combination of a current source; a circuit including a motor and impedance in series with the current source; a switch in the motor circuit between the motor and impedance; a circuit including a transformer primary and current interrupting device in parallel with the motor and impedance; and a third circuit including an auxiliary transformerprimary connected in parallel to said impedance,.

said third circuit being'connected to one side of the impedance through the current interrupting device and to the other side of the impedance through the motor circuit switch and said motor circuit switch being adapted to close simultaneously both the .motor and auxiliary primary circuits.

7 In an ignition system, the combination of an electric battery; an electric starting motor in series with the battery; a transformer primary circuit in parallel with the motor; and an auxiliary transformer primary connected so as to be in series with the parallel to a portion of the motor circuit.

8. In an ignition system, the combination of an electric battery; an electric starting motor in series with the battery; a transformer primarycircuit in parallel with the -motor; an auxiliary transformer primary connected'so as to be in series with the .motorand in parallel to a portion of the motor circuit, and means for simultaneously CARL P. BROOKWAY. 

